Showing error details for quota exceeded error for gce operations (#8030) (#14879)

* Showing error details for quota exceeded error for gce operations

* Modify the compute_operation to show quota exceeded error details

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/8030.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+compute: surface error details for Compute Operation with quota exceeded errors.
+```

google/services/compute/compute_operation.go

@@ -140,6 +140,14 @@ func writeOperationError(w io.StringWriter, opError *compute.OperationErrorError
 	var link *compute.HelpLink
 
 	for _, ed := range opError.ErrorDetails {
+		if opError.Code == "QUOTA_EXCEEDED" && ed.QuotaInfo != nil {
+			w.WriteString("\tmetric name = " + ed.QuotaInfo.MetricName + "\n")
+			w.WriteString("\tlimit name = " + ed.QuotaInfo.LimitName + "\n")
+			if ed.QuotaInfo.Dimensions != nil {
+				w.WriteString("\tdimensions = " + fmt.Sprint(ed.QuotaInfo.Dimensions) + "\n")
+			}
+			break
+		}
 		if lm == nil && ed.LocalizedMessage != nil {
 			lm = ed.LocalizedMessage
 		}

google/services/compute/compute_operation_test.go

@@ -15,6 +15,10 @@ const (
 	localizedMsgTmpl        = "LocalizedMessage%d message"
 	helpLinkDescriptionTmpl = "Help%dLink%d Description"
 	helpLinkUrlTmpl         = "https://help%d.com/link%d"
+	quotaExceededMsg        = "Quota DISKS_TOTAL_GB exceeded.  Limit: 1100.0 in region us-central1."
+	quotaExceededCode       = "QUOTA_EXCEEDED"
+	quotaMetricName         = "compute.googleapis.com/disks_total_storage"
+	quotaLimitName          = "DISKS-TOTAL-GB-per-project-region"
 )
 
 var locales = []string{"en-US", "es-US", "es-ES", "es-MX", "de-DE"}
@@ -53,6 +57,27 @@ func buildOperationError(numLocalizedMsg int, numHelpWithLinks []int) compute.Op
 
 }
 
+func buildOperationErrorQuotaExceeded(withDetails bool, withDimensions bool) compute.OperationError {
+	opError := &compute.OperationErrorErrors{Message: quotaExceededMsg, Code: quotaExceededCode}
+	opErrorErrors := []*compute.OperationErrorErrors{opError}
+	if withDetails {
+		quotaInfo := &compute.QuotaExceededInfo{
+			MetricName: quotaMetricName,
+			LimitName:  quotaLimitName,
+			Limit:      1100,
+		}
+		if withDimensions {
+			quotaInfo.Dimensions = map[string]string{"region": "us-central1"}
+		}
+		opError.ErrorDetails = append(opError.ErrorDetails,
+			&compute.OperationErrorErrorsErrorDetails{
+				QuotaInfo: quotaInfo,
+			})
+	}
+
+	return compute.OperationError{Errors: opErrorErrors}
+}
+
 func omitAlways(numLocalizedMsg int, numHelpWithLinks []int) []string {
 	var omits []string
 
@@ -180,6 +205,43 @@ func TestComputeOperationError_Error(t *testing.T) {
 			},
 			expectOmits: append(omitAlways(2, []int{1}), []string{}...),
 		},
+		{
+			name:  "QuotaMessageOnly",
+			input: buildOperationErrorQuotaExceeded(false, false),
+			expectContains: []string{
+				"Quota DISKS_TOTAL_GB exceeded.  Limit: 1100.0 in region us-central1.",
+			},
+			expectOmits: append(omitAlways(0, []int{}), []string{
+				"metric name = compute.googleapis.com/disks_total_storage",
+			}...),
+		},
+		{
+			name:  "QuotaMessageWithDetailsNoDimensions",
+			input: buildOperationErrorQuotaExceeded(true, false),
+			expectContains: []string{
+				"Quota DISKS_TOTAL_GB exceeded.  Limit: 1100.0 in region us-central1.",
+				"metric name = compute.googleapis.com/disks_total_storage",
+				"limit name = DISKS-TOTAL-GB-per-project-region",
+			},
+			expectOmits: append(omitAlways(0, []int{}), []string{
+				"dimensions = map[region:us-central1]",
+			}...),
+		},
+		{
+			name:  "QuotaMessageWithDetailsWithDimensions",
+			input: buildOperationErrorQuotaExceeded(true, true),
+			expectContains: []string{
+				"Quota DISKS_TOTAL_GB exceeded.  Limit: 1100.0 in region us-central1.",
+				"metric name = compute.googleapis.com/disks_total_storage",
+				"limit name = DISKS-TOTAL-GB-per-project-region",
+				"dimensions = map[region:us-central1]",
+			},
+			expectOmits: append(omitAlways(0, []int{}), []string{
+				"LocalizedMessage1",
+				"Help1Link1 Description",
+				"https://help1.com/link1",
+			}...),
+		},
 	}
 
 	for _, tc := range testCases {